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Physical & Chemical properties

Partition coefficient

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Link to relevant study record(s)

Description of key information

The retention time of the test item Bluequat-Bromid was in the range of the retention time of the reference items. The log Pow of the test item was estimated to be 2.44

Key value for chemical safety assessment

Log Kow (Log Pow):
2.44
at the temperature of:
20 °C

Additional information

The partition coefficient (n-octanol/water) of Bluequat-Bromid (batch PP 1 -4) was determined according to Directive 92/69/EC Method A.8 (1992) and OECD Guideline 117 (2004) on 2007 -07 -10 to 2007 -07 -11 at Dr.U.Noack-Laboratorien, 31157 -Sarstedt, Germany.

The test was conducted with a concentration of 1 mg/L in mobile phase consisting of methanol : phosphate buffer at pH 6 (50 : 50). Smaples of the test item Bluequat-Bromid were analysed via HPLC on a C18 column with DAD-detection.

Calibration was performed using six reference items with known log Pow values (given by the guidelines), each with a nominal concentration of 1 mg/L in mobile phase. Dead time of the HPLC-system was determined threefold using 5 mg/L sodium nitrate in mobile phase. For calibration data and detailed results please refere to part 4 of the study.